// kv_database_catalog_entry.h

/**
 *    Copyright (C) 2014 MongoDB Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#pragma once

#include <map>
#include <string>

#include <boost/scoped_ptr.hpp>
#include <boost/thread/mutex.hpp>

#include "mongo/db/catalog/database_catalog_entry.h"

namespace mongo {

    class KVCollectionCatalogEntry;
    class KVStorageEngine;

    class KVDatabaseCatalogEntry : public DatabaseCatalogEntry {
    public:
        KVDatabaseCatalogEntry( const StringData& db, KVStorageEngine* engine );
        virtual ~KVDatabaseCatalogEntry();

        virtual bool exists() const;
        virtual bool isEmpty() const;

        virtual int64_t sizeOnDisk( OperationContext* opCtx ) const;

        virtual void appendExtraStats( OperationContext* opCtx,
                                       BSONObjBuilder* out,
                                       double scale ) const;

        virtual bool isOlderThan24( OperationContext* opCtx ) const { return false; }
        virtual void markIndexSafe24AndUp( OperationContext* opCtx ) {}

        virtual bool currentFilesCompatible( OperationContext* opCtx ) const;

        virtual void getCollectionNamespaces( std::list<std::string>* out ) const;

        virtual CollectionCatalogEntry* getCollectionCatalogEntry( OperationContext* txn,
                                                                   const StringData& ns ) const;

        virtual RecordStore* getRecordStore( OperationContext* txn,
                                             const StringData& ns );

        virtual IndexAccessMethod* getIndex( OperationContext* txn,
                                             const CollectionCatalogEntry* collection,
                                             IndexCatalogEntry* index );

        virtual Status createCollection( OperationContext* txn,
                                         const StringData& ns,
                                         const CollectionOptions& options,
                                         bool allocateDefaultSpace );

        virtual Status renameCollection( OperationContext* txn,
                                         const StringData& fromNS,
                                         const StringData& toNS,
                                         bool stayTemp );

        virtual Status dropCollection( OperationContext* opCtx,
                                       const StringData& ns );

        // --------------

        void initCollection( OperationContext* opCtx,
                             const std::string& ns );

    private:
        KVStorageEngine* _engine; // not owned here
        bool _used;

        typedef std::map<std::string,KVCollectionCatalogEntry*> CollectionMap;
        CollectionMap _collections;
        mutable boost::mutex _collectionsLock;
    };
}
